Mill-roll bearing



1 Aug. 13,1929. A. w. DUNN MILL ROLL BEARING 2 sheets-sheet 'Filed July 9, 1926 Aug. 13, 1929. A. w. DUNN MILL ROLL BEARING Filed July 9, 1926 2 Sheets-Sheet Patented Aug. 13, 1929.

warren stares ALFRED W. DUNN, OF HONOMU, TERRITORY OF HAWAII. I

MILL-ROLL BEARING.

Application filed July 9, 1926. Serial No. 121,445.

This invention relates to bearings of cane mill rolls and has for its object the provision of simple, easily-applied and eflicient means for preventing access of juice and bagasse to the bearings of the crusher rolls.

In the manufacture of cane sugar, the cane is passed between heavy rolls arranged in two-roll and three-roll units wh reby the cane is crushed and the sugar-juice extracted. As the cane is crushed between the rolls, juices and fine bagasse work into the bearings of the lower rolls and destroy the lubricating oil film (due to acidity of cane juice) causing metallic contact which results in excessive wear and ultimately necessitates costly repairs. While elements known as juice rings or juice plates have been heretofore provided upon the trunnions or shafts of the crusher rolls, they have been unsatisfactory and inadequate because, as they rotated, the juices followed the peripheries of their flanges and were carried over the flanges by capillary action to enter the unprotected bearings. My invention provides a simple device whereby the cane juice and bagasse are efiectually excluded from the bearings. The invention is illustrated in the accompanying drawing and will be hereinafter first fully described and then more particularly defined in the appended claims.

In the drawings;

Figure 1 is an end view of so much of a cane mill as is necessary to an understanding of the invention, the driving gearing and adjusting screws being omitted;

Figure 2 is a side elevation of the same;

Figure 3 is a vertical section on the line 3-3 of Fig. 1;

Figure 4: is a perspective view of my bearing juice ring;

Figure 5 is a detail of the bearing;

Figure 6 is a detail 6-6 of Fig. 2.

In the drawing, the reference numeral 1 designates a portion of the frame or housing of a cane mill in which the bearing 2 is slidably mounted in the usual manner, the bearing being set to obtain the desired pressure between the cooperating rollers by an adjusting screw mounted in a cap plate (not shown). 3 designates a lower roll having its trunnion l mounted to rotate on the bearing 2, while 5 designates a roller juice ring an end portion of section on the line secured to the end of the roll, this ring being of a standard conventional form but having drag pins 6 added to its outer side for a purpose which will hereinafter appear. The drag pins project outwardly toward the housing parallel with the axis of the roll and near the periphery of the ring and are arranged in a circular series contamlifiig as many pins as may be deemed desna. e.

The bearing 2 has end flanges or extensions 7 whereby the seating surface will be substantially equal to the length of the journal or trunnion of the roll, and in the upper and lower terminals-of the inner extension I form recesses 8 to receive tongues or short ribs 9 provided at the ends of a bearing juice ring10, which ring rest-s against the terminal surfaces of the bearing, the trunnion or journal being completely encircled by the bearing and the bearing juice ring. The recesses 8 and the tongues 9 prevent lateral displacement of the bearing juice ring and the ring is held to the bear- I ing by clevises or spring latches 11 pivoted, as at 12, upon the inner extension 7 and engaging over lugs 13 on the circumferential surface of the juice ring at the ends thereof. At its inner side, the juice ring 10 is counterbored to accommodate packing 14 which conforms to the fillet of the journal and is held compressed to the journal by the tension of the spring latches 11, and, to insure perfect contact between the packing and the journal, the diameter of the bore of the ring is slightly greater than the diameter of the journal. The ring 10 is formed with a radially disposed flange 15 extending from end to end thereof which, as shown in Figs. 1 and 2, is so disposed as to intercept bagasse' and juice traveling from the roll or the roll juice ring toward the bearing or the housing. It will also be noted that the ends of the ring are cut away at their inner sides, as at 16, so that the parts carrying the tongues 9 may overlap the top and bottom of the bearing and thus prevent the entrance of juice between the abutting joint-forming end faces of the bearing and ring, while the packing 14 is held in contact with the rotating journal or trunnion under the action of the spring latches or clevises. A tight joint is thus effected around the roll bearing preventing the entrance of juice or bagasse thereto.

I also provide guards 17 which may be cast integral with the inner side of the frame or housing 1 but are shown as secured thereto by cap screws 18. A guard is located along the upper side and the inner end of each opening or channel provided for the bearing in the housing, the upper straight portion of the guard accommodating the movement of the bearing in adjustment of the roll and the inner arcuate end portion of the guard fitting to the bearing juice ring. The guard projects rearwardly and downwardly from the housing so as to fit over the flange 15 of the juice ring, as shown in Figs. 1 and 6, and an j juices that spurt from the end of the roller will be deflected onto the juice ring 10, bagasse deposits being deflected in the same manner. As the roller ring 5 revolves with the crushing roll, the drag pins 6 are successively caused to travel over the bearing juice ring and clear the same of the bagasse accumulations which drop into the usual juice pan below (not shown).

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided very simple means by which cane juices and bagasse will be effectually excluded from the bearing of the crusher roll, which means may be readily applied to any cane mill without necessitating material change in the construction of the mill or rearrangement of its parts.

Having fully described my invention what I claim as new and desire to secure by Lettars-Patent, is

1. The combination with a roll journal, and a bearing partly encircling the journal, the bearing being provided at its end with transverse grooves in its upper and lower sides, of a juice ring fitting around the journal and resting directly against the bearing, the ring having end extensions overlapping the top and bottom of the bearing and provioed on the inner sides of the extensions with tongues fitting in the grooves in the bearing, and means for holding the ring on the bearing.

2. The combination with a roll journal,

and a bearing, of a juice ring tting around the journal and held on the bearing, and means for clearing the ring of deposits.

3. The combination with a roll journal, its bearing, and a juice ring carried by the journal, of a juice ring carried by the bearing and fitted around the journal, and drag pins projecting from the first-mentioned juice ring to travel over the second-mentioned juice ring and remove deposits therefrom.

4:. The combination with a roll journal, and its bearing, of a juice ring fitting around the journal and held by the bearing, and a guard arranged above and overhanging the juice ring.

5. The combination of a frame, a bearing slidably mounted in the frame, a roll journal resting in the bearing, a juice ring fitting over the journal and held by the bearing, and a guard on the frame overhanging the juice ring, the guard having an upper straight portion to accommodate adjustment of the journal and the bearing and an inner arcuate portion to fit to the juice ring.

6. The combination with a frame, a hearing mounted in the frame, and a roller hav ing a journal resting on the bearing, the bearing having a flange at its end partly encircling the journal, of a juice ring disposed at the side of the frame presented to the roll and resting at its ends on and secured to the ends of the flange on the bearing to pass over the journal and turn aside juices tending to pass from the roll to the bearing.

7. The combination with a frame, a bear-- ing therein, and a roll having a journal rotatably resting in the bearing and having a juice rin on its end around the journal, of a juice ring resting at its ends upon and secured to the ends of the bearing alongside the frame, said juice ring and the bearing completely encircling the journal be tween the frame and the journal juice ring whereby access of juices from the roll to the bearing is prevented.

In testimony whereof, I have signed this specification.

ALFRED W. DUNN. 

